Name: Effigia (Ghost).
Phonetic: Ef-e-gee-ah.
Named By: Sterling J. Nesbitt & Mark Norell
- 2006.
Classification: Chordata, Reptilia, Diapsida,
Archosauromorpha, Crurotarsi, Rauisuchia, Poposauridae.
Species: E. okeeffeae (type).
Diet: Carnivore.
Size: 2 meters long.
Known locations: USA, New Mexico, Chinle Formation,
Ghost Ranch.
Time period: Triassic.
Fossil representation: 1 almost complete skeleton, 3
partial skeletons.
Although
Effigia resembles and ornithomimid
dinosaur, it is
thought that this is
just a case of convergent evolution. Later studies have suggested that
Effigia is the same creature as the archosaur Chatterjeea
and that both
are synonymous with the archosaur Shuvosaurus.
The
type specimen is named
after the renowned artist Georgia O'Keeffe, whose ashes were scattered
at Ghost Ranch.
Further reading
- Extreme convergence in the body plans of an early suchian
(Archosauria) and ornithomimid dinosaurs (Theropoda). - Proceedings of
the Royal Society of London B. - S. J. Nesbitt& M. A. Norell -
2006.
- The anatomy of Effigia okeeffeae (Archosauria,
Suchia), theropod-like
convergence, and the distribution of related taxa. - Bulletin of the
American Museum of Natural History, 302: 84 pp. - S. Nesbitt - 2007.